dfltcc.c 1.6 KB

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  1. // SPDX-License-Identifier: Zlib
  2. /* dfltcc.c - SystemZ DEFLATE CONVERSION CALL support. */
  3. #include <linux/export.h>
  4. #include <linux/module.h>
  5. #include "dfltcc_util.h"
  6. #include "dfltcc.h"
  7. char *oesc_msg(
  8. char *buf,
  9. int oesc
  10. )
  11. {
  12. if (oesc == 0x00)
  13. return NULL; /* Successful completion */
  14. else {
  15. #ifdef STATIC
  16. return NULL; /* Ignore for pre-boot decompressor */
  17. #else
  18. sprintf(buf, "Operation-Ending-Supplemental Code is 0x%.2X", oesc);
  19. return buf;
  20. #endif
  21. }
  22. }
  23. void dfltcc_reset(
  24. z_streamp strm,
  25. uInt size
  26. )
  27. {
  28. struct dfltcc_state *dfltcc_state =
  29. (struct dfltcc_state *)((char *)strm->state + size);
  30. struct dfltcc_qaf_param *param =
  31. (struct dfltcc_qaf_param *)&dfltcc_state->param;
  32. /* Initialize available functions */
  33. if (is_dfltcc_enabled()) {
  34. dfltcc(DFLTCC_QAF, param, NULL, NULL, NULL, NULL, NULL);
  35. memmove(&dfltcc_state->af, param, sizeof(dfltcc_state->af));
  36. } else
  37. memset(&dfltcc_state->af, 0, sizeof(dfltcc_state->af));
  38. /* Initialize parameter block */
  39. memset(&dfltcc_state->param, 0, sizeof(dfltcc_state->param));
  40. dfltcc_state->param.nt = 1;
  41. /* Initialize tuning parameters */
  42. if (zlib_dfltcc_support == ZLIB_DFLTCC_FULL_DEBUG)
  43. dfltcc_state->level_mask = DFLTCC_LEVEL_MASK_DEBUG;
  44. else
  45. dfltcc_state->level_mask = DFLTCC_LEVEL_MASK;
  46. dfltcc_state->block_size = DFLTCC_BLOCK_SIZE;
  47. dfltcc_state->block_threshold = DFLTCC_FIRST_FHT_BLOCK_SIZE;
  48. dfltcc_state->dht_threshold = DFLTCC_DHT_MIN_SAMPLE_SIZE;
  49. dfltcc_state->param.ribm = DFLTCC_RIBM;
  50. }
  51. EXPORT_SYMBOL(dfltcc_reset);
  52. MODULE_LICENSE("GPL");